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Map it out. Plan your route in advance to minimize the miles you need to drive and to help you avoid getting lost. While paper maps work fine, an Internet map, mapping software, or a GPS device makes it easier. A GPS unit can also help you quickly find gas stations, hotels, ATMs, and more, so you don't waste fuel hunting for them.
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take your time. You may be in a hurry to get to your destination, but the faster you drive on the highway, the worse your gas mileage will be. We tested a Toyota Camry's fuel economy at 55, 65, and 75 mph. Driving at 65 instead of 55 reduced the car's mpg from 40 to 35. Driving at 75 mph cut it to 30 mpg.
shed the carrier. If you can, avoid carrying things on top of your vehicle. On the highway, more than 50 percent of engine power goes to overcoming aerodynamic drag. Roof racks can significantly increase the drag. In our tests, we've found that a typical roof rack can shave about 6 ...